Anti-suffocation free aspiration system of respirator
An anti-suffocation and ventilator technology, applied in the field of flow sensors, can solve the problems of inability to guarantee the user's breathing safety and tightness
Inactive Publication Date: 2014-04-09
于邦仲
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Problems solved by technology
The traditional free breathing valve SV adopts electric control or mechanical control, and the breathing safety of the user cannot be guaranteed when the electric power is turned off.
Not tight when using machinery
Method used
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Embodiment Construction
[0020] The ventilator anti-suffocation free inhalation system of the specific embodiment of the present invention, the gas circuit structure is as follows figure 2 As shown, it consists of a free breathing valve SV and its pneumatic control part that communicates with the mixing chamber and the atmosphere when it is opened, and the pneumatic control part includes:
[0021] (1) High-pressure gas source with the same source as the gas source of the mixing chamber
[0022] The first one-way valve CV4, the bypass air passage is connected to the first air source passage of the mixing chamber; the second one-way valve CV5, the bypass air passage is connected to the second air source passage of the mixing chamber;
[0023] (2) Control
[0024] Two-position three-way solenoid valve SOV1, the outlet port is connected to the pneumatic control port of the free breathing valve SV, the exhaust port is connected to the atmosphere, and the inlet port is connected to the output port of the ...
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The invention relates to an anti-suffocation free aspiration system of a respirator. The anti-suffocation free aspiration system comprises a free respiration valve (SV), a first check valve (CV4) which is in bypass communication with a first air source passage of a mixing cavity, a second one-way valve (CV5) which is in bypass communication with a second air source passage of the mixing cavity, a two-position three-way solenoid operated valve (SOV1) and a control unit, wherein an air passage at the outlet end of the two-position three-way electromagnetic valve is communicated with the pneumatic control end of the free respiration valve, the exhaust port end is communicated with atmosphere, and the inlet end is respectively communicated with the output end of the first one-way valve and the output end of the second one-way valve via the air passages through a bifurcation; when the two-position three-way electromagnetic valve has no control signals or is not electrified, the outlet end of the two-position three-way electromagnetic valve is communicated with the exhaust port end through the air passage; the control unit is electrically connected with the control end of the two-position three-way electromagnetic valve and used for controlling the two-position three-way electromagnetic valve to enable the outlet end of the two-position three-way electromagnetic valve to be communicated with the inlet end through a gas circuit; and when high-pressure gas exists at the pneumatic control end, the free respiration valve can be closed. The anti-suffocation free aspiration system of the respirator can be tightly closed and ensure the safety in respiration of a user.
Description
technical field [0001] The invention relates to a flow sensor, in particular to an anti-suffocation free-inhalation system for a ventilator, especially used in medical electronics. Background technique [0002] Such as figure 1 As shown, the free breathing valve SV in the ventilator is connected between the external atmosphere and the mixing chamber. When the supply of oxygen and compressed air is stopped, the free breathing valve SV opens to communicate with the external atmosphere and the mixing chamber to ensure the breathing safety of the user. When the ventilator is working normally, the free breathing valve SV is closed to cut off the external atmosphere and the mixing chamber, and the oxygen and compressed air are supplied to the user for breathing. The traditional free breathing valve SV adopts electric control or mechanical control, which cannot guarantee the breathing safety of the user when the power is off. Not tight when using machinery. Contents of the inve...
Claims
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IPC IPC(8): A61M16/00A61M16/20
Inventor 成其新康婵娟刘龚
Owner 于邦仲